# Relationship history for MSHA mine 4103698

Current hierarchy: **Pioneer International Ltd--Tarrant Acquisition Ltd → Tarrant Aggregates Corp → TARRANT AGGREG CORP**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Tarrant Aggregates Corp → TARRANT AGGREG CORP; 1991-11-01 to 1993-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Morton Del → TARRANT AGGREG CORP; 1991-11-01 to 1993-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Morton Del → Tarrant Aggregates Corp; 1991-11-01 to 1993-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Tarrant Aggregates Corp → TARRANT AGGREG CORP; 1993-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pioneer International Ltd--Tarrant Acquisition Ltd → TARRANT AGGREG CORP; 1993-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pioneer International Ltd--Tarrant Acquisition Ltd → Tarrant Aggregates Corp; 1993-04-01 to current/open; source msha-controller-operator-history